한국수산과학회

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  • pISSN : 2234-8395
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  • eISSN : 2234-1757

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kfas, vol. 51, no. 6, pp.688-696, December, 2018
DOI. https://doi.org/10.5657/KFAS.2018.0688

Growth Performance and Physiological Changes of Olive Flounder
Paralichthys olivaceus by Concentration of Ozone Produced Oxidants in
Semi-RAS
반순환여과시스템에서 오존 유래 잔류산화물 농도에 따른
넙치(Paralichthys olivaceus)의 성장과 생리학적 변화

정상명·박우근·박정환1·김재원·김병기*
강원도립대학교 해양양식식품과, 1부경대학교 해양바이오신소재학과

This study investigated the effects of ozone-produced oxidants (OPO) on the growth, hematology, and histology of
olive flounder Paralichthys olivaceus (average weight 500 g), raised in an ozonated semi-recirculating aquaculture
system. The system was ozonated to maintained OPO concentrations of 0.004 (Control), 0.014 (OPO15), and 0.025
(OPO25) mg Cl2/L in culture tanks for 26 days. The specific growth rate, feed conversion ratio, and survival rate did
not significantly differ among the groups (P>0.05), while the daily feeding rate decreased OPO-dose-dependently
(P<0.05). OPO appeared to affect the gill, hepatopancreas, and kidney tissues of fish from ozonated tanks. Hematologically,
OPO affected some blood indices. The levels of chloride, glucose, glutamic oxaloacetic transaminase, and
glutamic pyruvic transaminase were significantly increased in the ozonated groups, while the total cholesterol and
cortisol decreased dose-dependently. These results imply that long-term exposure of olive flounder to an OPO concentration
≥ 0.014 mg Cl2/L might result in damage to the gill, hepatopancreas, and kidney tissues and cause physiological
stress, albeit with no apparent short-term effects on growth or survival.

Keyword : Ozone, Ozone-produced oxidants, Semi-RAS, Hematology, Histology

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